Which one of the following is true?
A. The principal quantum number of the electron in a hydrogen atom does not affect its energy.
B. The orbital angular momentum quantum number of an electron state is always less than the principal quantum number.
C. The electron spin quantum number can take on any one of four different values.
D. The principal quantum number of an electron in its ground state is zero.
B. The orbital angular momentum quantum number of an electron state is always less than the principal quantum number.
You might also like to view...
In a 2-dimensional Cartesian system, the y component of a vector is known, and the angle between vector and x axis is known. Which operation is used to calculate the magnitude of the vector (taken with respect to the y component)?
a. dividing by cosine c. multiplying by cosine b. dividing by sine d. multiplying by sine
Two bodies can be in thermal equilibrium with one another when they are at the same temperature even if they
a. absorb different quantities of thermal energy from their surroundings in equal time intervals. b. have different masses. c. have different volumes. d. have any of the properties listed above. e. have any of the properties listed above and one of them is contact with a third body at a different temperature.
A policeman in a stationary car measures the speed of approaching cars by means of an ultrasonic device that emits a sound with a frequency of 39.6 kHz
A car is approaching him at a speed of 35.0 m/s. The wave is reflected by the car and interferes with the emitted sound producing beats. What is the frequency of the beats when the speed of sound in air is 343 m/s? A) 5000 Hz B) 4500 Hz C) 8490 Hz D) 9000 Hz E) 4250 Hz
Decreasing the aperture diameter of a camera lens by a factor of three will change the f-number by what factor?
a. 3 c. 1/9 b. 9 d. 1/3